# Fibonacci numbers module

def fib(n):  # write Fibonacci series up to n
    a, b = 0, 1
    while a < n:
        print(a, end=' ')
        a, b = b, a + b
    print()


# def fib2(n):  # return Fibonacci series up to n
#    result = []
#    a, b = 0, 1
#    while a < n:
#        result.append(a)
#        a, b = b, a + b
#    return result
